Pliocene Alluvial to Marine Deposits of the Val D’Orcia Basin (Northern Apennines, Italy): Sequence Stratigraphy and Basin Analysis

The Val d'Orcia Basin, located in the Northern Apennines of Italy, was identified as an inherited depression formed by erosion during the Late Miocene-Early Pliocene transition. This study reveals that its Pliocene depositional history was primarily controlled by relative sea-level changes, leading to the recognition of three distinct depositional sequences (Vd3a-c). The Vd3a sequence records marine ingression and subsequent highstand, while Vd3b and Vd3c sequences reflect progressive basin widening. Notably, bioclastic deposits in the Vd3c sequence suggest potential climatic influence on sedimentation. The research employs a sequence stratigraphic approach to analyze these deposits, providing insights into the basin's geological evolution.

GHINASSI, M. A. S. S. I. M. I. L. I. A. N. O. (2007). PLIOCENE ALLUVIAL TO MARINE DEPOSITS OF THE VAL D’ORCIA BASIN (NORTHERN APENNINES, ITALY): SEQUENCE STRATIGRAPHY AND BASIN ANALYSIS. Rivista Italiana Di Paleontologia e Stratigrafia, Vol 113, No 3. https://doi.org/10.13130/2039-4942/5886